<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style type="text/css">
        .tab ul {
            overflow: hidden;
            padding: 0;
            margin: 0;
        }
        
        .tab ul li {
            box-sizing: border-box;
            padding: 0;
            float: left;
            width: 100px;
            height: 45px;
            line-height: 45px;
            list-style: none;
            text-align: center;
            border-top: 1px solid blue;
            border-right: 1px solid blue;
            cursor: pointer;
        }
        
        .tab ul li:first-child {
            border-left: 1px solid blue;
        }
        
        .tab ul li.active {
            background-color: orange;
        }
        
        .tab div {
            width: 500px;
            height: 300px;
            display: none;
            text-align: center;
            font-size: 30px;
            line-height: 300px;
            border: 1px solid blue;
            border-top: 0px;
        }
        
        .tab div.current {
            display: block;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="tab">
            <ul>
                <li :class="currentIndex==index? 'active':''" :key='item.id' v-for='(item,index) in list'>{{item.title}}</li>
                
            </ul>
            <div :class="currentIndex==index? 'current':''"  :key='item.id' v-for='item in list'>
                <img :src="item.path">

            </div>
            
        </div>
    </div>
    <script type="text/javascript" src="./vue.js.js"></script>
    <script type="text/javascript">
        /*
                                                              
                                                            */
        var vm = new Vue({
            el: '#app',
            data:{
                currentIndex:0,
                list:[{
                    id:1,
                    title:'apple',
                    path:'img/apple.png'
                },
                {
                    id:2,
                    title:'orange',
                    path:'img/orange.png'
                },
                {
                    id:3,
                    title:'lemon',
                    path:'img/lemon.png'
                },
            ]
            }
        });
    </script>
</body>

</html>